21995120

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:239

約数の個数: 120

約数和(自身を含む): 61746048

約数和(自身を除く): 39750928

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 49, 56, 62, 70, 80, 98, 112, 124, 140, 155, 181, 196, 217, 245, 248, 280, 310, 362, 392, 434, 490, 496, 560, 620, 724, 784, 868, 905, 980, 1085, 1240, 1267, 1448, 1519, 1736, 1810, 1960, 2170, 2480, 2534, 2896, 3038, 3472, 3620, 3920, 4340, 5068, 5611, 6076, 6335, 7240, 7595, 8680, 8869, 10136, 11222, 12152, 12670, 14480, 15190, 17360, 17738, 20272, 22444, 24304, 25340, 28055, 30380, 35476, 39277, 44345, 44888, 50680, 56110, 60760, 70952, 78554, 88690, 89776, 101360, 112220, 121520, 141904, 157108, 177380, 196385, 224440, 274939, 314216, 354760, 392770, 448880, 549878, 628432, 709520, 785540, 1099756, 1374695, 1571080, 2199512, 2749390, 3142160, 4399024, 5498780, 10997560, 21995120]

約数ペア:

[(1, 21995120), (2, 10997560), (4, 5498780), (5, 4399024), (7, 3142160), (8, 2749390), (10, 2199512), (14, 1571080), (16, 1374695), (20, 1099756), (28, 785540), (31, 709520), (35, 628432), (40, 549878), (49, 448880), (56, 392770), (62, 354760), (70, 314216), (80, 274939), (98, 224440), (112, 196385), (124, 177380), (140, 157108), (155, 141904), (181, 121520), (196, 112220), (217, 101360), (245, 89776), (248, 88690), (280, 78554), (310, 70952), (362, 60760), (392, 56110), (434, 50680), (490, 44888), (496, 44345), (560, 39277), (620, 35476), (724, 30380), (784, 28055), (868, 25340), (905, 24304), (980, 22444), (1085, 20272), (1240, 17738), (1267, 17360), (1448, 15190), (1519, 14480), (1736, 12670), (1810, 12152), (1960, 11222), (2170, 10136), (2480, 8869), (2534, 8680), (2896, 7595), (3038, 7240), (3472, 6335), (3620, 6076), (3920, 5611), (4340, 5068)]